[OSM-talk] near longitude 180
Robert (Jamie) Munro
rjmunro at arjam.net
Thu Feb 19 14:15:40 GMT 2009
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Robert Vollmert wrote:
> Hello,
>
> there's some strange coastline data near longitude 180. See eg
> http://openstreetmap.org/browse/way/24020654
>
> I thought I'd ask before trying to fix this, in case I'd flood the
> world otherwise.
>
> I haven't found an editor that works well in this area -- they all
> seem to think the world ends at ±180 degrees. Here's a challenge:
> Which editor will be first to support seamless editing all around the
> world? (Let's leave the poles out for now.)
The right solution here is to map 0-360 degrees to the unsigned integers
0-2^32. When you get an overflow, the right thing happens. It also makes
the most efficient use of the resolution available.
Jamie
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